Directory of computer-aided Drug Design tools

Click2Drug contains a comprehensive list of computer-aided drug design (CADD) software, databases and web services.
These tools are classified according to their application field, trying to cover the whole drug design pipeline.
If you think that an interesting tool is missing in this list, please contact us

Homology Modeling

Software

Modeller. Software for producing homology models of protein tertiary structures, using a technique inspired by nuclear magnetic resonance known as satisfaction of spatial restraints. Maintained by Andrej Sali at the University of California, San Francisco. Free for academic use. Graphical user interfaces and commercial versions are distributed by Accelrys.

I-TASSER. Internet service for protein structure and function predictions. Models are built based on multiple-threading alignments by LOMETS and iterative TASSER simulations. I-TASSER (as 'Zhang-Server') was ranked as the No 1 server in recent CASP7 and CASP8 experiments. Exists as a standalone package. Provided by the University of Michigan.

MPACK. (Modeling Package). Integrated protein modeling suite that currently handles comparative and ab initio modeling procedures. The objective of this suite is to systematically bring different steps (or programs) under one roof in order to facilitate rapid model generation with minimal user effort and to create a biological data-flow pipeline for large scale-scale modeling of protein sequences from genomic projects. Provided by the University of Texas.

ProModel. Allows homology modeling from either a selected template or a user defined template. Modeling in manual mode allows mutation, excision, deletion, insertion of residues or insertion of a loop by selecting the start and end anchors. Automated homology modeling can be performed by reading in the template file obtained from a local BLAST. ProModel enables analysis of the target protein structure, active site and channels. Provided by VLife.

TASSER-Lite. Protein structure comparative modeling tool. It is limited to protein target-template pairs whose pairwise sequence identity is >25% to the best threading template. It is optimized to model single domain proteins whose lengths range from 41-200 residues. Freely available to all academic users and not-for-profit institutions. Provided by the Skolnick Research Group.

SCRWL. Program for prediction of protein sice chains prediction, based on the Dunbrack backbone-dependent rotamer library. Provided by the Dunbrack Lab.

Biskit. Free and open source modular, object-oriented Python library for structural bioinformatics research that wraps external programs (BLAST, T-Coffee and Modeller) into an automated workflow. Developed by the institut Pasteur.

ModPipe. Completely automated software pipeline that can calculate protein structure models for a large number of sequences with almost no manual intervention. In the simplest case, it takes as input a sequence identifier and a configuration file and produces one or more comparative models for that sequence. Free and open source software. Maintained by Andrej Sali at the University of California, San Francisco.

RaptorX. Protein structure prediction program developed by Xu group, with a particular focus on the alignment of distantly-related proteins with sparse sequence profile and that of a single target to multiple templates. Currently, RaptorX consists of four major modules: single-template threading, alignment quality assessment, multiple-template threading and fragment-free approach to free modeling. Also exists as a web service.

ProSide. Predicts protein sidechain conformation. Since the residue-substitution by the target amino-acid sequence is possible, ProSide can be used also for simple homology modeling, in case there are neither insertion nor deletion. Can perform global optimization calculation of a complex, by putting ligand to a binding site, and optimizing positions and conformations of ligand and amino-acid sidechains. Distributed by IMMD.

ModWeb. Server for Protein Structure Modeling based on the Modeller program. Maintained by Andrej Sali at the University of California, San Francisco.

I-TASSER. Internet service for protein structure and function predictions. Models are built based on multiple-threading alignments by LOMETS and iterative TASSER simulations. I-TASSER (as 'Zhang-Server') was ranked as the No 1 server in recent CASP7 and CASP8 experiments. Exists as a standalone package. Provided by the University of Michigan.

RaptorX web server. Protein structure prediction web server developed by Xu group, with a particular focus on the alignment of distantly-related proteins with sparse sequence profile and that of a single target to multiple templates. Currently, RaptorX consists of four major modules: single-template threading, alignment quality assessment, multiple-template threading and fragment-free approach to free modeling. Due to limited computational power, this server offers the first three modules for regular usage. Also exists as a standalone program.

ModBase. Database of three-dimensional protein models calculated by comparative modeling. The models are derived by ModPipe, an automated modeling pipeline relying on the programs PSI-BLAST and MODELLER. The database also includes fold assignments and alignments on which the models were based. MODBASE also contains information about putative ligand binding sites, SNP annotation, and protein-protein interactions.

ModEval. Model evaluation server for protein structure models. Maintained by Andrej Sali at the University of California, San Francisco.

ModLoop. Web server for automated modeling of loops in protein structures. The server relies on the loop modeling routine in MODELLER that predicts the loop conformations by satisfaction of spatial restraints, without relying on a database of known protein structures. Maintained by Andrej Sali at the University of California, San Francisco.

Protinfo ABCM. The Protinfo web server consists of a series of discrete modules that make predictions of, and provide information about, protein folding, structure, function, interaction, evolution, and design by applying computational methodologies developed by the Samudrala Computational Biology Research Group.

PMP. (Protein Model Portal). Gives access to various models computed by comparative modeling methods provided by different partner sites, and provides access to various interactive services for model building, and quality assessment. Provided by the Swiss Institute of BioInformatics and the University of Basel.

QUARK. Internet service for ab initio protein folding and protein structure prediction, which aims to construct the correct protein 3D model from amino acid sequence only. QUARK models are built from small fragments (1-20 residues long) by replica-exchange Monte Carlo simulation under the guide of an atomic-level knowledge-based force field. QUARK was ranked as the No 1 server in Free-modeling (FM) in CASP9. Since no global template information is used in QUARK simulation, the server is suitable for proteins which are considered without homologous templates. Provided by the University of Michigan.

SuperLooper. SuperLooper provides an online interface for the automatic, quick and interactive search and placement of loops in proteins. Loop candidates are selected from a database (LIMP) comprising ~ 180.000 loops of membrane proteins or, alternatively, from (LIP) containing ~ 513.000.00 segments of water-soluble proteins with lengths up to 35 residues. In addition to several filtering criteria regarding structural and sequence features, the software allows for placing the loop within the predicted membrane-water interface. Provided by Charité Berlin, Structural Bioinformatics Group.

PEP-FOLD. De novo approach aimed at predicting peptide structures from amino acid sequences. This method, based on structural alphabet SA letters to describe the conformations of four consecutive residues, couples the predicted series of SA letters to a greedy algorithm and a coarse-grained force field. Developed by the University of Paris Diderot.

ESyPred3D. Automated homology modeling web server in which lignments are obtained by combining, weighting and screening the results of several multiple alignment programs. The final three dimensional structure is built using the modeling package MODELLER.

chunk-TASSER. Protein structure prediction method that combines threading templates from SP3 and ab initio folded chunk structures (three consecutive segments of regular secondary structures). For extreme hard targets. This web service is freely available to all academic users and not-for-profit institutions. Provided by the Skolnick. Research Group.

MetaTASSER. Protein tertiary prediction method that employs the 3D-Jury approach to select threading templates from SPARKS, SP3 and PROSPECTOR_3, which provides aligned fragments and tertiary restraints as an input to TASSER (Threading/ASSEmbly/Refinement) procedure to generate full-length models. This web service is freely available to all academic users and not-for-profit institutions. Provided by the Skolnick.

pro-sp3-TASSER. Protein Structure Prediction tool that uses a single threading method with multiple scoring to identify templates. Short TASSER runs generate full length models that are selected by TASSER-QA and FTCOM ranking procedures. pro-sp3-TASSER performs better than MetaTASSER for medium/hard targets, but is computationally more expensive. This web service is freely available to all academic users and not-for-profit institutions. Provided by the Skolnick.

BSR. Binding Site Refinement employs a new template-based method for the local refinement of ligand-binding regions in protein models using closely as well as distantly related templates identified by threading. This web service is freely available to all academic users and not-for-profit institutions. Provided by the Center for the Study of Systems Biology, Atlanta.

3D-Jigsaw. Automated system to build three-dimensional models for proteins based on homologues of known structure.

VADAR. (Volume, Area, Dihedral Angle Reporter) is a compilation of more than 15 different algorithms and programs for analyzing and assessing peptide and protein structures from their PDB coordinate data to quantitatively and qualitatively assess protein structures determined by X-ray crystallography, NMR spectroscopy, 3D-threading or homology modelling. Provided by the University of Alberta, Canada.

GPCRautomodel. Web service that automates the homology modeling of mammalian olfactory receptors (ORs) based on the six three-dimensional (3D) structures of G protein-coupled receptors (GPCRs) available so far and (ii) performs the docking of odorants on these models, using the concept of colony energy to score the complexes. Provided by INRA.

HOMODELLER. Web server to predict protein 3D structure (PDB coordinates) from its primary sequence file by homology modelling. Provided by the University of Alberta, Canada.

PEPstr. Web server to predict the tertiary structure of small peptides with sequence length varying between 7 to 25 residues. The prediction strategy is based on the realization that β-turn is an important and consistent feature of small peptides in addition to regular structures. Provided by the Bioinformatics Centre, Institute of Microbial Technology, Chandigarh.

FOBIA. Folding by hierarchical assembly. Provided by the structural Bioinformatics group at Tel-Aviv University.